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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [posix/] [execvp.c] - Blame information for rev 829

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Line No. Rev Author Line
1 207 jeremybenn
#ifndef _NO_EXECVE
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/* execvp.c */
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/* This and the other exec*.c files in this directory require
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   the target to provide the _execve syscall.  */
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#include <_ansi.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <string.h>
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#include <errno.h>
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#include <ctype.h>
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#define PATH_DELIM ':'
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/*
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 * Copy string, until c or <nul> is encountered.
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 * NUL-terminate the destination string (s1).
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 */
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static char *
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_DEFUN (strccpy, (s1, s2, c),
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        char *s1 _AND
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        char *s2 _AND
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        char c)
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{
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  char *dest = s1;
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  while (*s2 && *s2 != c)
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    *s1++ = *s2++;
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  *s1 = 0;
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  return dest;
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}
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int
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_DEFUN (execvp, (file, argv),
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        _CONST char *file _AND
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        char * _CONST argv[])
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{
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  char *path = getenv ("PATH");
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  char buf[MAXNAMLEN];
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  /* If $PATH doesn't exist, just pass FILE on unchanged.  */
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  if (!path)
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    return execv (file, argv);
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  /* If FILE contains a directory, don't search $PATH.  */
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  if (strchr (file, '/')
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      )
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    return execv (file, argv);
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  while (*path)
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    {
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      strccpy (buf, path, PATH_DELIM);
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      /* An empty entry means the current directory.  */
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      if (*buf != 0 && buf[strlen(buf) - 1] != '/')
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        strcat (buf, "/");
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      strcat (buf, file);
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      if (execv (buf, argv) == -1 && errno != ENOENT)
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        return -1;
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      while (*path && *path != PATH_DELIM)
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        path++;
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      if (*path == PATH_DELIM)
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        path++;                 /* skip over delim */
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    }
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  return -1;
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}
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#endif /* !_NO_EXECVE  */

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