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[/] [or1k/] [trunk/] [uclinux/] [userland/] [sash/] [cmds.c] - Blame information for rev 1767

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/*
 * Modifications for uClinux
 * Copyright (C) 1998  Kenneth Albanowski <kjahds@kjahds.com>
 *
 * Original code
 * Copyright (c) 1993 by David I. Bell
 * Permission is granted to use, distribute, or modify this source,
 * provided that this copyright notice remains intact.
 *
 * Most simple built-in commands are here.
 */
 
#include "sash.h"
 
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <pwd.h>
#include <grp.h>
#include <utime.h>
#include <errno.h>
 
 
void
do_echo(argc, argv)
        char    **argv;
{
        BOOL    first;
 
        first = TRUE;
        while (argc-- > 1) {
                if (!first)
                        fputc(' ', stdout);
                first = FALSE;
                fputs(*++argv, stdout);
        }
        fputc('\n', stdout);
}
 
 
void
do_pwd(argc, argv)
        char    **argv;
{
        char    buf[PATHLEN];
 
        if (getcwd(buf, PATHLEN) == NULL) {
                fprintf(stderr, "Cannot get current directory\n");
                return;
        }
 
        printf("%s\n", buf);
}
 
void
do_time(argc, argv)
        char ** argv;
{
        struct timeval tv;
        gettimeofday(&tv, 0);
        printf("Time of day = %d.%6.6d seconds\n", tv.tv_sec, tv.tv_usec);
}
 
void
do_cd(argc, argv)
        char    **argv;
{
        char    *path;
 
        if (argc > 1)
                path = argv[1];
        else {
                path = getenv("HOME");
                if (path == NULL) {
                        fprintf(stderr, "No HOME environment variable\n");
                        return;
                }
        }
 
        if (chdir(path) < 0)
                perror(path);
}
 
 
void
do_mkdir(argc, argv)
        char    **argv;
{
        while (argc-- > 1) {
                if (mkdir(argv[1], 0777) < 0)
                        perror(argv[1]);
                argv++;
        }
}
 
void
do_sleep(argc, argv)
        char    **argv;
{
        if (argc > 1)
                sleep(atoi(argv[1]));
}
 
void
do_mknod(argc, argv)
        char    **argv;
{
        char    *cp;
        int     mode;
        int     major;
        int     minor;
 
        mode = 0666;
 
        if (strcmp(argv[2], "b") == 0)
                mode |= S_IFBLK;
        else if (strcmp(argv[2], "c") == 0)
                mode |= S_IFCHR;
        else {
                fprintf(stderr, "Bad device type\n");
                return;
        }
 
        major = 0;
        cp = argv[3];
        while (isdecimal(*cp))
                major = major * 10 + *cp++ - '0';
 
        if (*cp || (major < 0) || (major > 255)) {
                fprintf(stderr, "Bad major number\n");
                return;
        }
 
        minor = 0;
        cp = argv[4];
        while (isdecimal(*cp))
                minor = minor * 10 + *cp++ - '0';
 
        if (*cp || (minor < 0) || (minor > 255)) {
                fprintf(stderr, "Bad minor number\n");
                return;
        }
 
        if (mknod(argv[1], mode, major * 256 + minor) < 0)
                perror(argv[1]);
}
 
 
void
do_rmdir(argc, argv)
        char    **argv;
{
        while (argc-- > 1) {
                if (rmdir(argv[1]) < 0)
                        perror(argv[1]);
                argv++;
        }
}
 
 
void
do_sync(argc, argv)
        char    **argv;
{
#ifdef EMBED
#define FLATFSD_PID_FILE "/var/log/flatfsd.pid"
        pid_t pid;
        FILE *in;
 
        /* get the pid of flatfsd */
        if ((in = fopen(FLATFSD_PID_FILE, "r")) != NULL) {
                if (fread(&pid, sizeof(pid_t), 1, in) > 0) {
                        /* we read something.. hopefully the pid */
                        /* send that pid signal 10 */
                        kill(pid, 10);
                }
                fclose(in);
        }
#endif
        sync();
 
}
 
 
void
do_rm(argc, argv)
        char    **argv;
{
        while (argc-- > 1) {
                if (unlink(argv[1]) < 0)
                        perror(argv[1]);
                argv++;
        }
}
 
 
void
do_chmod(argc, argv)
        char    **argv;
{
        char    *cp;
        int     mode;
 
        mode = 0;
        cp = argv[1];
        while (isoctal(*cp))
                mode = mode * 8 + (*cp++ - '0');
 
        if (*cp) {
                fprintf(stderr, "Mode must be octal\n");
                return;
        }
        argc--;
        argv++;
 
        while (argc-- > 1) {
                if (chmod(argv[1], mode) < 0)
                        perror(argv[1]);
                argv++;
        }
}
 
 
void
do_chown(argc, argv)
        char    **argv;
{
        char            *cp;
        int             uid;
        struct passwd   *pwd;
        struct stat     statbuf;
 
        cp = argv[1];
        if (isdecimal(*cp)) {
                uid = 0;
                while (isdecimal(*cp))
                        uid = uid * 10 + (*cp++ - '0');
 
                if (*cp) {
                        fprintf(stderr, "Bad uid value\n");
                        return;
                }
        } else {
                pwd = getpwnam(cp);
                if (pwd == NULL) {
                        fprintf(stderr, "Unknown user name\n");
                        return;
                }
 
                uid = pwd->pw_uid;
        }
 
        argc--;
        argv++;
 
        while (argc-- > 1) {
                argv++;
                if ((stat(*argv, &statbuf) < 0) ||
                        (chown(*argv, uid, statbuf.st_gid) < 0))
                                perror(*argv);
        }
}
 
 
void
do_chgrp(argc, argv)
        char    **argv;
{
        char            *cp;
        int             gid;
        struct group    *grp;
        struct stat     statbuf;
 
        cp = argv[1];
        if (isdecimal(*cp)) {
                gid = 0;
                while (isdecimal(*cp))
                        gid = gid * 10 + (*cp++ - '0');
 
                if (*cp) {
                        fprintf(stderr, "Bad gid value\n");
                        return;
                }
        } else {
                grp = getgrnam(cp);
                if (grp == NULL) {
                        fprintf(stderr, "Unknown group name\n");
                        return;
                }
 
                gid = grp->gr_gid;
        }
 
        argc--;
        argv++;
 
        while (argc-- > 1) {
                argv++;
                if ((stat(*argv, &statbuf) < 0) ||
                        (chown(*argv, statbuf.st_uid, gid) < 0))
                                perror(*argv);
        }
}
 
 
void
do_touch(argc, argv)
        char    **argv;
{
        char            *name;
        int             fd;
        struct  utimbuf now;
 
        time(&now.actime);
        now.modtime = now.actime;
 
        while (argc-- > 1) {
                name = *(++argv);
 
                if (utime(name, &now) <0)
                {
                fd = open(name, O_CREAT | O_WRONLY | O_EXCL, 0666);
                if (fd >= 0)
                        {
                        close(fd);
                        continue;
                        }
                perror(name);
                }
        }
}
 
 
void
do_mv(argc, argv)
        char    **argv;
{
        int     dirflag;
        char    *srcname;
        char    *destname;
        char    *lastarg;
 
        lastarg = argv[argc - 1];
 
        dirflag = isadir(lastarg);
 
        if ((argc > 3) && !dirflag) {
                fprintf(stderr, "%s: not a directory\n", lastarg);
                return;
        }
 
        while (argc-- > 2) {
                srcname = *(++argv);
                if (access(srcname, 0) < 0) {
                        perror(srcname);
                        continue;
                }
 
                destname = lastarg;
                if (dirflag)
                        destname = buildname(destname, srcname);
 
                if (rename(srcname, destname) >= 0)
                        continue;
 
                if (errno != EXDEV) {
                        perror(destname);
                        continue;
                }
 
                if (!copyfile(srcname, destname, TRUE))
                        continue;
 
                if (unlink(srcname) < 0)
                        perror(srcname);
        }
}
 
 
void
do_ln(argc, argv)
        char    **argv;
{
        int     dirflag;
        char    *srcname;
        char    *destname;
        char    *lastarg;
 
        if (argv[1][0] == '-') {
                if (strcmp(argv[1], "-s")) {
                        fprintf(stderr, "Unknown option\n");
                        return;
                }
 
                if (argc != 4) {
                        fprintf(stderr, "Wrong number of arguments for symbolic link\n");
                        return;
                }
 
#ifdef  S_ISLNK
                if (symlink(argv[2], argv[3]) < 0)
                        perror(argv[3]);
#else
                fprintf(stderr, "Symbolic links are not allowed\n");
#endif
                return;
        }
 
        /*
         * Here for normal hard links.
         */
        lastarg = argv[argc - 1];
        dirflag = isadir(lastarg);
 
        if ((argc > 3) && !dirflag) {
                fprintf(stderr, "%s: not a directory\n", lastarg);
                return;
        }
 
        while (argc-- > 2) {
                srcname = *(++argv);
                if (access(srcname, 0) < 0) {
                        perror(srcname);
                        continue;
                }
 
                destname = lastarg;
                if (dirflag)
                        destname = buildname(destname, srcname);
 
                if (link(srcname, destname) < 0) {
                        perror(destname);
                        continue;
                }
        }
}
 
 
void
do_cp(argc, argv)
        char    **argv;
{
        BOOL    dirflag;
        char    *srcname;
        char    *destname;
        char    *lastarg;
 
        lastarg = argv[argc - 1];
 
        dirflag = isadir(lastarg);
 
        if ((argc > 3) && !dirflag) {
                fprintf(stderr, "%s: not a directory\n", lastarg);
                return;
        }
 
        while (argc-- > 2) {
                destname = lastarg;
                srcname = *++argv;
                if (dirflag)
                        destname = buildname(destname, srcname);
 
                (void) copyfile(srcname, destname, FALSE);
        }
}
 
 
void
do_mount(argc, argv)
        char    **argv;
{
        char    *str;
        char    *type;
 
        argc--;
        argv++;
        type = "minix";
 
        while ((argc > 0) && (**argv == '-')) {
                argc--;
                str = *argv++ ;
 
                while (*++str) switch (*str) {
                        case 't':
                                if ((argc <= 0) || (**argv == '-')) {
                                        fprintf(stderr, "Missing file system type\n");
                                        return;
                                }
 
                                type = *argv++;
                                argc--;
                                break;
 
                        default:
                                fprintf(stderr, "Unknown option\n");
                                return;
                }
        }
 
        if (argc != 2) {
                fprintf(stderr, "Wrong number of arguments for mount\n");
                return;
        }
 
        if (mount(argv[0], argv[1], type, 0) < 0)
                perror("mount failed");
}
 
 
void
do_umount(argc, argv)
        char    **argv;
{
        if (umount(argv[1]) < 0)
                perror(argv[1]);
}
 
 
void
do_cmp(argc, argv)
        char    **argv;
{
        int             fd1;
        int             fd2;
        int             cc1;
        int             cc2;
        long            pos;
        char            *srcname;
        char            *destname;
        char            *lastarg;
        char            *bp1;
        char            *bp2;
        char            *buf1;
        char            *buf2;
        struct  stat    statbuf1;
        struct  stat    statbuf2;
 
        if (stat(argv[1], &statbuf1) < 0) {
                perror(argv[1]);
                return;
        }
 
        if (stat(argv[2], &statbuf2) < 0) {
                perror(argv[2]);
                return;
        }
 
        if ((statbuf1.st_dev == statbuf2.st_dev) &&
                (statbuf1.st_ino == statbuf2.st_ino))
        {
                printf("Files are links to each other\n");
                return;
        }
 
        if (statbuf1.st_size != statbuf2.st_size) {
                printf("Files are different sizes\n");
                return;
        }
 
        fd1 = open(argv[1], 0);
        if (fd1 < 0) {
                perror(argv[1]);
                return;
        }
 
        fd2 = open(argv[2], 0);
        if (fd2 < 0) {
                perror(argv[2]);
                close(fd1);
                return;
        }
 
        buf1 = malloc(8192-16);
        buf2 = malloc(8192-16);
 
        pos = 0;
        while (TRUE) {
                if (intflag)
                        goto closefiles;
 
                cc1 = read(fd1, buf1, 8192-16);
                if (cc1 < 0) {
                        perror(argv[1]);
                        goto closefiles;
                }
 
                cc2 = read(fd2, buf2, 8192-16);
                if (cc2 < 0) {
                        perror(argv[2]);
                        goto closefiles;
                }
 
                if ((cc1 == 0) && (cc2 == 0)) {
                        printf("Files are identical\n");
                        goto closefiles;
                }
 
                if (cc1 < cc2) {
                        printf("First file is shorter than second\n");
                        goto closefiles;
                }
 
                if (cc1 > cc2) {
                        printf("Second file is shorter than first\n");
                        goto closefiles;
                }
 
                if (memcmp(buf1, buf2, cc1) == 0) {
                        pos += cc1;
                        continue;
                }
 
                bp1 = buf1;
                bp2 = buf2;
                while (*bp1++ == *bp2++)
                        pos++;
 
                printf("Files differ at byte position %ld\n", pos);
                goto closefiles;
        }
 
closefiles:
        close(fd1);
        close(fd2);
        free(buf1);
        free(buf2);
}
 
 
void
do_more(argc, argv)
        char    **argv;
{
        FILE    *fp;
        char    *name;
        int     ch;
        int     line;
        int     col;
        char    buf[80];
 
        while (argc-- > 1) {
                name = *(++argv);
 
                fp = fopen(name, "r");
                if (fp == NULL) {
                        perror(name);
                        return;
                }
 
                printf("<< %s >>\n", name);
                line = 1;
                col = 0;
 
                while (fp && ((ch = fgetc(fp)) != EOF)) {
                        switch (ch) {
                                case '\r':
                                        col = 0;
                                        break;
 
                                case '\n':
                                        line++;
                                        col = 0;
                                        break;
 
                                case '\t':
                                        col = ((col + 1) | 0x07) + 1;
                                        break;
 
                                case '\b':
                                        if (col > 0)
                                                col--;
                                        break;
 
                                default:
                                        col++;
                        }
 
                        putchar(ch);
                        if (col >= 80) {
                                col -= 80;
                                line++;
                        }
 
                        if (line < 24)
                                continue;
 
                        if (col > 0)
                                putchar('\n');
 
                        printf("--More--");
                        fflush(stdout);
 
                        if (intflag || (read(0, buf, sizeof(buf)) < 0)) {
                                if (fp)
                                        fclose(fp);
                                return;
                        }
 
                        ch = buf[0];
                        if (ch == ':')
                                ch = buf[1];
 
                        switch (ch) {
                                case 'N':
                                case 'n':
                                        fclose(fp);
                                        fp = NULL;
                                        break;
 
                                case 'Q':
                                case 'q':
                                        fclose(fp);
                                        return;
                        }
 
                        col = 0;
                        line = 1;
                }
                if (fp)
                        fclose(fp);
        }
}
 
 
void
do_exit(argc, argv)
        char    **argv;
{
        exit(0);
}
 
 
void
do_setenv(argc, argv)
        char    **argv;
{
        setenv(argv[1], argv[2], 1);
}
 
 
void
do_printenv(argc, argv)
        char    **argv;
{
        char            **env;
        extern char     **environ;
        int             len;
 
        env = environ;
 
        if (argc == 1) {
                while (*env)
                        printf("%s\n", *env++);
                return;
        }
 
        len = strlen(argv[1]);
        while (*env) {
                if ((strlen(*env) > len) && (env[0][len] == '=') &&
                        (memcmp(argv[1], *env, len) == 0))
                {
                        printf("%s\n", &env[0][len+1]);
                        return;
                }
                env++;
        }
}
 
 
void
do_umask(argc, argv)
        char    **argv;
{
        char    *cp;
        int     mask;
 
        if (argc <= 1) {
                mask = umask(0);
                umask(mask);
                printf("%03o\n", mask);
                return;
        }
 
        mask = 0;
        cp = argv[1];
        while (isoctal(*cp))
                mask = mask * 8 + *cp++ - '0';
 
        if (*cp || (mask & ~0777)) {
                fprintf(stderr, "Bad umask value\n");
                return;
        }
 
        umask(mask);
}
 
 
void
do_kill(argc, argv)
        char    **argv;
{
        char    *cp;
        int     sig;
        int     pid;
 
        sig = SIGTERM;
 
        if (argv[1][0] == '-') {
                cp = &argv[1][1];
                if (strcmp(cp, "HUP") == 0)
                        sig = SIGHUP;
                else if (strcmp(cp, "INT") == 0)
                        sig = SIGINT;
                else if (strcmp(cp, "QUIT") == 0)
                        sig = SIGQUIT;
                else if (strcmp(cp, "ILL") == 0)
                        sig = SIGILL;
                else if (strcmp(cp, "TRAP") == 0)
                        sig = SIGTRAP;
                else if (strcmp(cp, "ABRT") == 0)
                        sig = SIGABRT;
                else if (strcmp(cp, "IOT") == 0)
                        sig = SIGIOT;
                else if (strcmp(cp, "BUS") == 0)
                        sig = SIGBUS;
                else if (strcmp(cp, "FPE") == 0)
                        sig = SIGFPE;
                else if (strcmp(cp, "KILL") == 0)
                        sig = SIGKILL;
                else if (strcmp(cp, "USR1") == 0)
                        sig = SIGUSR1;
                else if (strcmp(cp, "SEGV") == 0)
                        sig = SIGSEGV;
                else if (strcmp(cp, "USR2") == 0)
                        sig = SIGUSR2;
                else if (strcmp(cp, "PIPE") == 0)
                        sig = SIGPIPE;
                else if (strcmp(cp, "ALRM") == 0)
                        sig = SIGALRM;
                else if (strcmp(cp, "TERM") == 0)
                        sig = SIGTERM;
                else if (strcmp(cp, "STKFLT") == 0)
                        sig = SIGSTKFLT;
                else if (strcmp(cp, "CHLD") == 0)
                        sig = SIGCHLD;
                else if (strcmp(cp, "CONT") == 0)
                        sig = SIGCONT;
                else if (strcmp(cp, "STOP") == 0)
                        sig = SIGSTOP;
                else if (strcmp(cp, "TSTP") == 0)
                        sig = SIGTSTP;
                else if (strcmp(cp, "TTIN") == 0)
                        sig = SIGTTIN;
                else if (strcmp(cp, "TTOU") == 0)
                        sig = SIGTTOU;
                else if (strcmp(cp, "URG") == 0)
                        sig = SIGURG;
                else if (strcmp(cp, "PWR") == 0)
                        sig = SIGPWR;
                else {
                        sig = 0;
                        while (isdecimal(*cp))
                                sig = sig * 10 + *cp++ - '0';
 
                        if (*cp) {
                                fprintf(stderr, "Unknown signal\n");
                                return;
                        }
                }
                argc--;
                argv++;
        }
 
        while (argc-- > 1) {
                cp = *++argv;
                pid = 0;
                while (isdecimal(*cp))
                        pid = pid * 10 + *cp++ - '0';
 
                if (*cp) {
                        fprintf(stderr, "Non-numeric pid\n");
                        return;
                }
 
                if (kill(pid, sig) < 0)
                        perror(*argv);
        }
}
 
/* END CODE */

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[/] [or1k/] [trunk/] [uclinux/] [userland/] [sash/] [cmds.c] - Blame information for rev 1767

Line No.	Rev	Author	Line
1	199	simons	`/*`
2			`* Modifications for uClinux`
3			`* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>`
4			`*`
5			`* Original code`
6			`* Copyright (c) 1993 by David I. Bell`
7			`* Permission is granted to use, distribute, or modify this source,`
8			`* provided that this copyright notice remains intact.`
9			`*`
10			`* Most simple built-in commands are here.`
11			`*/`
12
13			`#include "sash.h"`
14
15			`#include <sys/types.h>`
16			`#include <sys/stat.h>`
17			`#include <sys/time.h>`
18			`#include <unistd.h>`
19			`#include <fcntl.h>`
20			`#include <signal.h>`
21			`#include <pwd.h>`
22			`#include <grp.h>`
23			`#include <utime.h>`
24			`#include <errno.h>`
25
26
27			`void`
28			`do_echo(argc, argv)`
29			`char **argv;`
30			`{`
31			`BOOL first;`
32
33			`first = TRUE;`
34			`while (argc-- > 1) {`
35			`if (!first)`
36			`fputc(' ', stdout);`
37			`first = FALSE;`
38			`fputs(*++argv, stdout);`
39			`}`
40			`fputc('\n', stdout);`
41			`}`
42
43
44			`void`
45			`do_pwd(argc, argv)`
46			`char **argv;`
47			`{`
48			`char buf[PATHLEN];`
49
50			`if (getcwd(buf, PATHLEN) == NULL) {`
51			`fprintf(stderr, "Cannot get current directory\n");`
52			`return;`
53			`}`
54
55			`printf("%s\n", buf);`
56			`}`
57
58			`void`
59			`do_time(argc, argv)`
60			`char ** argv;`
61			`{`
62			`struct timeval tv;`
63			`gettimeofday(&tv, 0);`
64			`printf("Time of day = %d.%6.6d seconds\n", tv.tv_sec, tv.tv_usec);`
65			`}`
66
67			`void`
68			`do_cd(argc, argv)`
69			`char **argv;`
70			`{`
71			`char *path;`
72
73			`if (argc > 1)`
74			`path = argv[1];`
75			`else {`
76			`path = getenv("HOME");`
77			`if (path == NULL) {`
78			`fprintf(stderr, "No HOME environment variable\n");`
79			`return;`
80			`}`
81			`}`
82
83			`if (chdir(path) < 0)`
84			`perror(path);`
85			`}`
86
87
88			`void`
89			`do_mkdir(argc, argv)`
90			`char **argv;`
91			`{`
92			`while (argc-- > 1) {`
93			`if (mkdir(argv[1], 0777) < 0)`
94			`perror(argv[1]);`
95			`argv++;`
96			`}`
97			`}`
98
99			`void`
100			`do_sleep(argc, argv)`
101			`char **argv;`
102			`{`
103			`if (argc > 1)`
104			`sleep(atoi(argv[1]));`
105			`}`
106
107			`void`
108			`do_mknod(argc, argv)`
109			`char **argv;`
110			`{`
111			`char *cp;`
112			`int mode;`
113			`int major;`
114			`int minor;`
115
116			`mode = 0666;`
117
118			`if (strcmp(argv[2], "b") == 0)`
119			`mode \|= S_IFBLK;`
120			`else if (strcmp(argv[2], "c") == 0)`
121			`mode \|= S_IFCHR;`
122			`else {`
123			`fprintf(stderr, "Bad device type\n");`
124			`return;`
125			`}`
126
127			`major = 0;`
128			`cp = argv[3];`
129			`while (isdecimal(*cp))`
130			`major = major * 10 + *cp++ - '0';`
131
132			`if (*cp \|\| (major < 0) \|\| (major > 255)) {`
133			`fprintf(stderr, "Bad major number\n");`
134			`return;`
135			`}`
136
137			`minor = 0;`
138			`cp = argv[4];`
139			`while (isdecimal(*cp))`
140			`minor = minor * 10 + *cp++ - '0';`
141
142			`if (*cp \|\| (minor < 0) \|\| (minor > 255)) {`
143			`fprintf(stderr, "Bad minor number\n");`
144			`return;`
145			`}`
146
147			`if (mknod(argv[1], mode, major * 256 + minor) < 0)`
148			`perror(argv[1]);`
149			`}`
150
151
152			`void`
153			`do_rmdir(argc, argv)`
154			`char **argv;`
155			`{`
156			`while (argc-- > 1) {`
157			`if (rmdir(argv[1]) < 0)`
158			`perror(argv[1]);`
159			`argv++;`
160			`}`
161			`}`
162
163
164			`void`
165			`do_sync(argc, argv)`
166			`char **argv;`
167			`{`
168			`#ifdef EMBED`
169			`#define FLATFSD_PID_FILE "/var/log/flatfsd.pid"`
170			`pid_t pid;`
171			`FILE *in;`
172
173			`/* get the pid of flatfsd */`
174			`if ((in = fopen(FLATFSD_PID_FILE, "r")) != NULL) {`
175			`if (fread(&pid, sizeof(pid_t), 1, in) > 0) {`
176			`/* we read something.. hopefully the pid */`
177			`/* send that pid signal 10 */`
178			`kill(pid, 10);`
179			`}`
180			`fclose(in);`
181			`}`
182			`#endif`
183			`sync();`
184
185			`}`
186
187
188			`void`
189			`do_rm(argc, argv)`
190			`char **argv;`
191			`{`
192			`while (argc-- > 1) {`
193			`if (unlink(argv[1]) < 0)`
194			`perror(argv[1]);`
195			`argv++;`
196			`}`
197			`}`
198
199
200			`void`
201			`do_chmod(argc, argv)`
202			`char **argv;`
203			`{`
204			`char *cp;`
205			`int mode;`
206
207			`mode = 0;`
208			`cp = argv[1];`
209			`while (isoctal(*cp))`
210			`mode = mode * 8 + (*cp++ - '0');`
211
212			`if (*cp) {`
213			`fprintf(stderr, "Mode must be octal\n");`
214			`return;`
215			`}`
216			`argc--;`
217			`argv++;`
218
219			`while (argc-- > 1) {`
220			`if (chmod(argv[1], mode) < 0)`
221			`perror(argv[1]);`
222			`argv++;`
223			`}`
224			`}`
225
226
227			`void`
228			`do_chown(argc, argv)`
229			`char **argv;`
230			`{`
231			`char *cp;`
232			`int uid;`
233			`struct passwd *pwd;`
234			`struct stat statbuf;`
235
236			`cp = argv[1];`
237			`if (isdecimal(*cp)) {`
238			`uid = 0;`
239			`while (isdecimal(*cp))`
240			`uid = uid * 10 + (*cp++ - '0');`
241
242			`if (*cp) {`
243			`fprintf(stderr, "Bad uid value\n");`
244			`return;`
245			`}`
246			`} else {`
247			`pwd = getpwnam(cp);`
248			`if (pwd == NULL) {`
249			`fprintf(stderr, "Unknown user name\n");`
250			`return;`
251			`}`
252
253			`uid = pwd->pw_uid;`
254			`}`
255
256			`argc--;`
257			`argv++;`
258
259			`while (argc-- > 1) {`
260			`argv++;`
261			`if ((stat(*argv, &statbuf) < 0) \|\|`
262			`(chown(*argv, uid, statbuf.st_gid) < 0))`
263			`perror(*argv);`
264			`}`
265			`}`
266
267
268			`void`
269			`do_chgrp(argc, argv)`
270			`char **argv;`
271			`{`
272			`char *cp;`
273			`int gid;`
274			`struct group *grp;`
275			`struct stat statbuf;`
276
277			`cp = argv[1];`
278			`if (isdecimal(*cp)) {`
279			`gid = 0;`
280			`while (isdecimal(*cp))`
281			`gid = gid * 10 + (*cp++ - '0');`
282
283			`if (*cp) {`
284			`fprintf(stderr, "Bad gid value\n");`
285			`return;`
286			`}`
287			`} else {`
288			`grp = getgrnam(cp);`
289			`if (grp == NULL) {`
290			`fprintf(stderr, "Unknown group name\n");`
291			`return;`
292			`}`
293
294			`gid = grp->gr_gid;`
295			`}`
296
297			`argc--;`
298			`argv++;`
299
300			`while (argc-- > 1) {`
301			`argv++;`
302			`if ((stat(*argv, &statbuf) < 0) \|\|`
303			`(chown(*argv, statbuf.st_uid, gid) < 0))`
304			`perror(*argv);`
305			`}`
306			`}`
307
308
309			`void`
310			`do_touch(argc, argv)`
311			`char **argv;`
312			`{`
313			`char *name;`
314			`int fd;`
315			`struct utimbuf now;`
316
317			`time(&now.actime);`
318			`now.modtime = now.actime;`
319
320			`while (argc-- > 1) {`
321			`name = *(++argv);`
322
323			`if (utime(name, &now) <0)`
324			`{`
325			`fd = open(name, O_CREAT \| O_WRONLY \| O_EXCL, 0666);`
326			`if (fd >= 0)`
327			`{`
328			`close(fd);`
329			`continue;`
330			`}`
331			`perror(name);`
332			`}`
333			`}`
334			`}`
335
336
337			`void`
338			`do_mv(argc, argv)`
339			`char **argv;`
340			`{`
341			`int dirflag;`
342			`char *srcname;`
343			`char *destname;`
344			`char *lastarg;`
345
346			`lastarg = argv[argc - 1];`
347
348			`dirflag = isadir(lastarg);`
349
350			`if ((argc > 3) && !dirflag) {`
351			`fprintf(stderr, "%s: not a directory\n", lastarg);`
352			`return;`
353			`}`
354
355			`while (argc-- > 2) {`
356			`srcname = *(++argv);`
357			`if (access(srcname, 0) < 0) {`
358			`perror(srcname);`
359			`continue;`
360			`}`
361
362			`destname = lastarg;`
363			`if (dirflag)`
364			`destname = buildname(destname, srcname);`
365
366			`if (rename(srcname, destname) >= 0)`
367			`continue;`
368
369			`if (errno != EXDEV) {`
370			`perror(destname);`
371			`continue;`
372			`}`
373
374			`if (!copyfile(srcname, destname, TRUE))`
375			`continue;`
376
377			`if (unlink(srcname) < 0)`
378			`perror(srcname);`
379			`}`
380			`}`
381
382
383			`void`
384			`do_ln(argc, argv)`
385			`char **argv;`
386			`{`
387			`int dirflag;`
388			`char *srcname;`
389			`char *destname;`
390			`char *lastarg;`
391
392			`if (argv[1][0] == '-') {`
393			`if (strcmp(argv[1], "-s")) {`
394			`fprintf(stderr, "Unknown option\n");`
395			`return;`
396			`}`
397
398			`if (argc != 4) {`
399			`fprintf(stderr, "Wrong number of arguments for symbolic link\n");`
400			`return;`
401			`}`
402
403			`#ifdef S_ISLNK`
404			`if (symlink(argv[2], argv[3]) < 0)`
405			`perror(argv[3]);`
406			`#else`
407			`fprintf(stderr, "Symbolic links are not allowed\n");`
408			`#endif`
409			`return;`
410			`}`
411
412			`/*`
413			`* Here for normal hard links.`
414			`*/`
415			`lastarg = argv[argc - 1];`
416			`dirflag = isadir(lastarg);`
417
418			`if ((argc > 3) && !dirflag) {`
419			`fprintf(stderr, "%s: not a directory\n", lastarg);`
420			`return;`
421			`}`
422
423			`while (argc-- > 2) {`
424			`srcname = *(++argv);`
425			`if (access(srcname, 0) < 0) {`
426			`perror(srcname);`
427			`continue;`
428			`}`
429
430			`destname = lastarg;`
431			`if (dirflag)`
432			`destname = buildname(destname, srcname);`
433
434			`if (link(srcname, destname) < 0) {`
435			`perror(destname);`
436			`continue;`
437			`}`
438			`}`
439			`}`
440
441
442			`void`
443			`do_cp(argc, argv)`
444			`char **argv;`
445			`{`
446			`BOOL dirflag;`
447			`char *srcname;`
448			`char *destname;`
449			`char *lastarg;`
450
451			`lastarg = argv[argc - 1];`
452
453			`dirflag = isadir(lastarg);`
454
455			`if ((argc > 3) && !dirflag) {`
456			`fprintf(stderr, "%s: not a directory\n", lastarg);`
457			`return;`
458			`}`
459
460			`while (argc-- > 2) {`
461			`destname = lastarg;`
462			`srcname = *++argv;`
463			`if (dirflag)`
464			`destname = buildname(destname, srcname);`
465
466			`(void) copyfile(srcname, destname, FALSE);`
467			`}`
468			`}`
469
470
471			`void`
472			`do_mount(argc, argv)`
473			`char **argv;`
474			`{`
475			`char *str;`
476			`char *type;`
477
478			`argc--;`
479			`argv++;`
480			`type = "minix";`
481
482			`while ((argc > 0) && (**argv == '-')) {`
483			`argc--;`
484			`str = *argv++ ;`
485
486			`while (++str) switch (str) {`
487			`case 't':`
488			`if ((argc <= 0) \|\| (**argv == '-')) {`
489			`fprintf(stderr, "Missing file system type\n");`
490			`return;`
491			`}`
492
493			`type = *argv++;`
494			`argc--;`
495			`break;`
496
497			`default:`
498			`fprintf(stderr, "Unknown option\n");`
499			`return;`
500			`}`
501			`}`
502
503			`if (argc != 2) {`
504			`fprintf(stderr, "Wrong number of arguments for mount\n");`
505			`return;`
506			`}`
507
508			`if (mount(argv[0], argv[1], type, 0) < 0)`
509			`perror("mount failed");`
510			`}`
511
512
513			`void`
514			`do_umount(argc, argv)`
515			`char **argv;`
516			`{`
517			`if (umount(argv[1]) < 0)`
518			`perror(argv[1]);`
519			`}`
520
521
522			`void`
523			`do_cmp(argc, argv)`
524			`char **argv;`
525			`{`
526			`int fd1;`
527			`int fd2;`
528			`int cc1;`
529			`int cc2;`
530			`long pos;`
531			`char *srcname;`
532			`char *destname;`
533			`char *lastarg;`
534			`char *bp1;`
535			`char *bp2;`
536			`char *buf1;`
537			`char *buf2;`
538			`struct stat statbuf1;`
539			`struct stat statbuf2;`
540
541			`if (stat(argv[1], &statbuf1) < 0) {`
542			`perror(argv[1]);`
543			`return;`
544			`}`
545
546			`if (stat(argv[2], &statbuf2) < 0) {`
547			`perror(argv[2]);`
548			`return;`
549			`}`
550
551			`if ((statbuf1.st_dev == statbuf2.st_dev) &&`
552			`(statbuf1.st_ino == statbuf2.st_ino))`
553			`{`
554			`printf("Files are links to each other\n");`
555			`return;`
556			`}`
557
558			`if (statbuf1.st_size != statbuf2.st_size) {`
559			`printf("Files are different sizes\n");`
560			`return;`
561			`}`
562
563			`fd1 = open(argv[1], 0);`
564			`if (fd1 < 0) {`
565			`perror(argv[1]);`
566			`return;`
567			`}`
568
569			`fd2 = open(argv[2], 0);`
570			`if (fd2 < 0) {`
571			`perror(argv[2]);`
572			`close(fd1);`
573			`return;`
574			`}`
575
576			`buf1 = malloc(8192-16);`
577			`buf2 = malloc(8192-16);`
578
579			`pos = 0;`
580			`while (TRUE) {`
581			`if (intflag)`
582			`goto closefiles;`
583
584			`cc1 = read(fd1, buf1, 8192-16);`
585			`if (cc1 < 0) {`
586			`perror(argv[1]);`
587			`goto closefiles;`
588			`}`
589
590			`cc2 = read(fd2, buf2, 8192-16);`
591			`if (cc2 < 0) {`
592			`perror(argv[2]);`
593			`goto closefiles;`
594			`}`
595
596			`if ((cc1 == 0) && (cc2 == 0)) {`
597			`printf("Files are identical\n");`
598			`goto closefiles;`
599			`}`
600
601			`if (cc1 < cc2) {`
602			`printf("First file is shorter than second\n");`
603			`goto closefiles;`
604			`}`
605
606			`if (cc1 > cc2) {`
607			`printf("Second file is shorter than first\n");`
608			`goto closefiles;`
609			`}`
610
611			`if (memcmp(buf1, buf2, cc1) == 0) {`
612			`pos += cc1;`
613			`continue;`
614			`}`
615
616			`bp1 = buf1;`
617			`bp2 = buf2;`
618			`while (bp1++ == bp2++)`
619			`pos++;`
620
621			`printf("Files differ at byte position %ld\n", pos);`
622			`goto closefiles;`
623			`}`
624
625			`closefiles:`
626			`close(fd1);`
627			`close(fd2);`
628			`free(buf1);`
629			`free(buf2);`
630			`}`
631
632
633			`void`
634			`do_more(argc, argv)`
635			`char **argv;`
636			`{`
637			`FILE *fp;`
638			`char *name;`
639			`int ch;`
640			`int line;`
641			`int col;`
642			`char buf[80];`
643
644			`while (argc-- > 1) {`
645			`name = *(++argv);`
646
647			`fp = fopen(name, "r");`
648			`if (fp == NULL) {`
649			`perror(name);`
650			`return;`
651			`}`
652
653			`printf("<< %s >>\n", name);`
654			`line = 1;`
655			`col = 0;`
656
657			`while (fp && ((ch = fgetc(fp)) != EOF)) {`
658			`switch (ch) {`
659			`case '\r':`
660			`col = 0;`
661			`break;`
662
663			`case '\n':`
664			`line++;`
665			`col = 0;`
666			`break;`
667
668			`case '\t':`
669			`col = ((col + 1) \| 0x07) + 1;`
670			`break;`
671
672			`case '\b':`
673			`if (col > 0)`
674			`col--;`
675			`break;`
676
677			`default:`
678			`col++;`
679			`}`
680
681			`putchar(ch);`
682			`if (col >= 80) {`
683			`col -= 80;`
684			`line++;`
685			`}`
686
687			`if (line < 24)`
688			`continue;`
689
690			`if (col > 0)`
691			`putchar('\n');`
692
693			`printf("--More--");`
694			`fflush(stdout);`
695
696			`if (intflag \|\| (read(0, buf, sizeof(buf)) < 0)) {`
697			`if (fp)`
698			`fclose(fp);`
699			`return;`
700			`}`
701
702			`ch = buf[0];`
703			`if (ch == ':')`
704			`ch = buf[1];`
705
706			`switch (ch) {`
707			`case 'N':`
708			`case 'n':`
709			`fclose(fp);`
710			`fp = NULL;`
711			`break;`
712
713			`case 'Q':`
714			`case 'q':`
715			`fclose(fp);`
716			`return;`
717			`}`
718
719			`col = 0;`
720			`line = 1;`
721			`}`
722			`if (fp)`
723			`fclose(fp);`
724			`}`
725			`}`
726
727
728			`void`
729			`do_exit(argc, argv)`
730			`char **argv;`
731			`{`
732			`exit(0);`
733			`}`
734
735
736			`void`
737			`do_setenv(argc, argv)`
738			`char **argv;`
739			`{`
740			`setenv(argv[1], argv[2], 1);`
741			`}`
742
743
744			`void`
745			`do_printenv(argc, argv)`
746			`char **argv;`
747			`{`
748			`char **env;`
749			`extern char **environ;`
750			`int len;`
751
752			`env = environ;`
753
754			`if (argc == 1) {`
755			`while (*env)`
756			`printf("%s\n", *env++);`
757			`return;`
758			`}`
759
760			`len = strlen(argv[1]);`
761			`while (*env) {`
762			`if ((strlen(*env) > len) && (env[0][len] == '=') &&`
763			`(memcmp(argv[1], *env, len) == 0))`
764			`{`
765			`printf("%s\n", &env[0][len+1]);`
766			`return;`
767			`}`
768			`env++;`
769			`}`
770			`}`
771
772
773			`void`
774			`do_umask(argc, argv)`
775			`char **argv;`
776			`{`
777			`char *cp;`
778			`int mask;`
779
780			`if (argc <= 1) {`
781			`mask = umask(0);`
782			`umask(mask);`
783			`printf("%03o\n", mask);`
784			`return;`
785			`}`
786
787			`mask = 0;`
788			`cp = argv[1];`
789			`while (isoctal(*cp))`
790			`mask = mask * 8 + *cp++ - '0';`
791
792			`if (*cp \|\| (mask & ~0777)) {`
793			`fprintf(stderr, "Bad umask value\n");`
794			`return;`
795			`}`
796
797			`umask(mask);`
798			`}`
799
800
801			`void`
802			`do_kill(argc, argv)`
803			`char **argv;`
804			`{`
805			`char *cp;`
806			`int sig;`
807			`int pid;`
808
809			`sig = SIGTERM;`
810
811			`if (argv[1][0] == '-') {`
812			`cp = &argv[1][1];`
813			`if (strcmp(cp, "HUP") == 0)`
814			`sig = SIGHUP;`
815			`else if (strcmp(cp, "INT") == 0)`
816			`sig = SIGINT;`
817			`else if (strcmp(cp, "QUIT") == 0)`
818			`sig = SIGQUIT;`
819			`else if (strcmp(cp, "ILL") == 0)`
820			`sig = SIGILL;`
821			`else if (strcmp(cp, "TRAP") == 0)`
822			`sig = SIGTRAP;`
823			`else if (strcmp(cp, "ABRT") == 0)`
824			`sig = SIGABRT;`
825			`else if (strcmp(cp, "IOT") == 0)`
826			`sig = SIGIOT;`
827			`else if (strcmp(cp, "BUS") == 0)`
828			`sig = SIGBUS;`
829			`else if (strcmp(cp, "FPE") == 0)`
830			`sig = SIGFPE;`
831			`else if (strcmp(cp, "KILL") == 0)`
832			`sig = SIGKILL;`
833			`else if (strcmp(cp, "USR1") == 0)`
834			`sig = SIGUSR1;`
835			`else if (strcmp(cp, "SEGV") == 0)`
836			`sig = SIGSEGV;`
837			`else if (strcmp(cp, "USR2") == 0)`
838			`sig = SIGUSR2;`
839			`else if (strcmp(cp, "PIPE") == 0)`
840			`sig = SIGPIPE;`
841			`else if (strcmp(cp, "ALRM") == 0)`
842			`sig = SIGALRM;`
843			`else if (strcmp(cp, "TERM") == 0)`
844			`sig = SIGTERM;`
845			`else if (strcmp(cp, "STKFLT") == 0)`
846			`sig = SIGSTKFLT;`
847			`else if (strcmp(cp, "CHLD") == 0)`
848			`sig = SIGCHLD;`
849			`else if (strcmp(cp, "CONT") == 0)`
850			`sig = SIGCONT;`
851			`else if (strcmp(cp, "STOP") == 0)`
852			`sig = SIGSTOP;`
853			`else if (strcmp(cp, "TSTP") == 0)`
854			`sig = SIGTSTP;`
855			`else if (strcmp(cp, "TTIN") == 0)`
856			`sig = SIGTTIN;`
857			`else if (strcmp(cp, "TTOU") == 0)`
858			`sig = SIGTTOU;`
859			`else if (strcmp(cp, "URG") == 0)`
860			`sig = SIGURG;`
861			`else if (strcmp(cp, "PWR") == 0)`
862			`sig = SIGPWR;`
863			`else {`
864			`sig = 0;`
865			`while (isdecimal(*cp))`
866			`sig = sig * 10 + *cp++ - '0';`
867
868			`if (*cp) {`
869			`fprintf(stderr, "Unknown signal\n");`
870			`return;`
871			`}`
872			`}`
873			`argc--;`
874			`argv++;`
875			`}`
876
877			`while (argc-- > 1) {`
878			`cp = *++argv;`
879			`pid = 0;`
880			`while (isdecimal(*cp))`
881			`pid = pid * 10 + *cp++ - '0';`
882
883			`if (*cp) {`
884			`fprintf(stderr, "Non-numeric pid\n");`
885			`return;`
886			`}`
887
888			`if (kill(pid, sig) < 0)`
889			`perror(*argv);`
890			`}`
891			`}`
892
893			`/* END CODE */`