URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [posix/] [wordexp.c] - Rev 262
Go to most recent revision | Compare with Previous | Blame | View Log
/* Copyright (C) 2002 by Red Hat, Incorporated. All rights reserved. * * Permission to use, copy, modify, and distribute this software * is freely granted, provided that this notice is preserved. */ #ifndef _NO_WORDEXP #include <sys/param.h> #include <sys/stat.h> #include <ctype.h> #include <dirent.h> #include <errno.h> #include <glob.h> #include <pwd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <sys/wait.h> #include <wordexp.h> #define MAXLINELEN 500 /* Note: This implementation of wordexp requires a version of bash that supports the --wordexp and --protected arguments to be present on the system. It does not support the WRDE_UNDEF flag. */ int wordexp(const char *words, wordexp_t *pwordexp, int flags) { FILE *f; FILE *f_err; char tmp[MAXLINELEN]; int i = 0; int offs = 0; char *iter; pid_t pid; int num_words = 0; int num_bytes = 0; int fd[2]; int fd_err[2]; int err = 0; if (pwordexp == NULL) { return WRDE_NOSPACE; } if (flags & WRDE_REUSE) wordfree(pwordexp); if ((flags & WRDE_APPEND) == 0) { pwordexp->we_wordc = 0; pwordexp->we_wordv = NULL; } if (flags & WRDE_DOOFFS) { offs = pwordexp->we_offs; if(!(pwordexp->we_wordv = (char **)realloc(pwordexp->we_wordv, (pwordexp->we_wordc + offs + 1) * sizeof(char *)))) return WRDE_NOSPACE; for (i = 0; i < offs; i++) pwordexp->we_wordv[i] = NULL; } pipe(fd); pipe(fd_err); pid = fork(); if (pid > 0) { /* In parent process. */ /* Close write end of parent's pipe. */ close(fd[1]); close(fd_err[1]); /* f_err is the standard error from the shell command. */ f_err = fdopen(fd_err[0], "r"); /* Check for errors. */ if (fgets(tmp, MAXLINELEN, f_err)) { if (strstr(tmp, "EOF")) err = WRDE_SYNTAX; else if (strstr(tmp, "`\n'") || strstr(tmp, "`|'") || strstr(tmp, "`&'") || strstr(tmp, "`;'") || strstr(tmp, "`<'") || strstr(tmp, "`>'") || strstr(tmp, "`('") || strstr(tmp, "`)'") || strstr(tmp, "`{'") || strstr(tmp, "`}'")) err = WRDE_BADCHAR; else if (strstr(tmp, "command substitution")) err = WRDE_CMDSUB; else err = WRDE_SYNTAX; if (flags & WRDE_SHOWERR) { fprintf(stderr, tmp); while(fgets(tmp, MAXLINELEN, f_err)) fprintf(stderr, tmp); } return err; } /* f is the standard output from the shell command. */ f = fdopen(fd[0], "r"); /* Get number of words expanded by shell. */ fgets(tmp, MAXLINELEN, f); if((iter = strchr(tmp, '\n'))) *iter = '\0'; num_words = atoi(tmp); if(!(pwordexp->we_wordv = (char **)realloc(pwordexp->we_wordv, (pwordexp->we_wordc + num_words + offs + 1) * sizeof(char *)))) return WRDE_NOSPACE; /* Get number of bytes required for storage of num_words words. */ fgets(tmp, MAXLINELEN, f); if((iter = strchr(tmp, '\n'))) *iter = '\0'; num_bytes = atoi(tmp) + pwordexp->we_wordc; /* Get each expansion from the shell output, and store each in pwordexp's we_wordv vector. */ for(i = 0; i < num_words; i++) { fgets(tmp, MAXLINELEN, f); if((iter = strchr(tmp, '\n'))) *iter = '\0'; pwordexp->we_wordv[pwordexp->we_wordc + offs + i] = strdup(tmp); } pwordexp->we_wordv[pwordexp->we_wordc + offs + i] = NULL; pwordexp->we_wordc += num_words; close(fd[0]); close(fd_err[0]); /* Wait for child to finish. */ waitpid (pid, NULL, 0); return WRDE_SUCCESS; } else { /* In child process. */ /* Close read end of child's pipe. */ close(fd[0]); close(fd_err[0]); /* Pipe standard output to parent process via fd. */ if (fd[1] != STDOUT_FILENO) { dup2(fd[1], STDOUT_FILENO); /* fd[1] no longer required. */ close(fd[1]); } /* Pipe standard error to parent process via fd_err. */ if (fd_err[1] != STDERR_FILENO) { dup2(fd_err[1], STDERR_FILENO); /* fd_err[1] no longer required. */ close(fd_err[1]); } if (flags & WRDE_NOCMD) execl("/bin/bash", "bash", "--protected", "--wordexp", words, (char *)0); else execl("/bin/bash", "bash", "--wordexp", words, (char *)0); } return WRDE_SUCCESS; } #endif /* !_NO_WORDEXP */
Go to most recent revision | Compare with Previous | Blame | View Log