diff options
Diffstat (limited to 'src/process/execvp.c')
-rw-r--r-- | src/process/execvp.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/process/execvp.c b/src/process/execvp.c new file mode 100644 index 0000000..d799dda --- /dev/null +++ b/src/process/execvp.c @@ -0,0 +1,34 @@ +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +extern char **__environ; + +int execvp(const char *file, char *const argv[]) +{ + const char *p, *z, *path = getenv("PATH"); + int l; + + if (strchr(file, '/')) + return execve(file, argv, __environ); + + /* FIXME: integer overflows */ + if (!path) path = "/usr/local/bin:/bin:/usr/bin"; + l = strlen(file) + strlen(path) + 2; + + for(p=path; p && *p; p=z) { + char b[l]; + z = strchr(p, ':'); + if (z) { + memcpy(b, p, z-p); + b[z++-p] = 0; + } else strcpy(b, p); + strcat(b, "/"); + strcat(b, file); + if (!access(b, X_OK)) + return execve(b, argv, __environ); + } + errno = ENOENT; + return -1; +} |