diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/include/skalibs/posixplz.h | 1 | ||||
-rw-r--r-- | src/libposixplz/execvep.c | 33 | ||||
-rw-r--r-- | src/libposixplz/execvep_internal.c | 37 | ||||
-rw-r--r-- | src/libposixplz/execvep_loose.c | 13 | ||||
-rw-r--r-- | src/libposixplz/posixplz-internal.h | 8 |
5 files changed, 63 insertions, 29 deletions
diff --git a/src/include/skalibs/posixplz.h b/src/include/skalibs/posixplz.h index 72cffee..1e7692d 100644 --- a/src/include/skalibs/posixplz.h +++ b/src/include/skalibs/posixplz.h @@ -39,6 +39,7 @@ extern int getpeereid (int, uid_t *, gid_t *) ; */ extern void execvep (char const *, char const *const *, char const *const *, char const *) ; +extern void execvep_loose (char const *, char const *const *, char const *const *, char const *) ; extern pid_t doublefork (void) ; extern int touch (char const *) ; diff --git a/src/libposixplz/execvep.c b/src/libposixplz/execvep.c index acdf11f..461f238 100644 --- a/src/libposixplz/execvep.c +++ b/src/libposixplz/execvep.c @@ -2,38 +2,13 @@ #include <unistd.h> #include <string.h> -#include <errno.h> -#include <skalibs/bytestr.h> #include <skalibs/posixplz.h> +#include "posixplz-internal.h" void execvep (char const *file, char const *const *argv, char const *const *envp, char const *path) { - if (!path) errno = EINVAL ; - else if (file[str_chr(file, '/')]) - execve(file, (char *const *)argv, (char *const *)envp) ; /* execve prototype sucks */ + if (strchr(file, '/')) + execve(file, (char *const *)argv, (char *const *)envp) ; else - { - size_t pathlen = strlen(path) + 1 ; - size_t filelen = strlen(file) ; - int savederrno = 0 ; - while (pathlen) - { - size_t split = byte_chr(path, pathlen - 1, ':') ; - if (split) - { - char tmp[split + 2 + filelen] ; - memcpy(tmp, path, split) ; - tmp[split] = '/' ; - memcpy(tmp + split + 1, file, filelen + 1) ; - execve(tmp, (char *const *)argv, (char *const *)envp) ; - if (errno != ENOENT) - { - savederrno = errno ; - if ((errno != EACCES) && (errno != EPERM) && (errno != EISDIR)) break ; - } - } - path += split+1 ; pathlen -= split+1 ; - } - if (savederrno) errno = savederrno ; - } + execvep_internal(file, argv, envp, path) ; } diff --git a/src/libposixplz/execvep_internal.c b/src/libposixplz/execvep_internal.c new file mode 100644 index 0000000..17858f0 --- /dev/null +++ b/src/libposixplz/execvep_internal.c @@ -0,0 +1,37 @@ +/* ISC license. */ + +#include <unistd.h> +#include <string.h> +#include <errno.h> +#include <skalibs/bytestr.h> +#include <skalibs/posixplz.h> + +void execvep_internal (char const *file, char const *const *argv, char const *const *envp, char const *path) +{ + if (!path) errno = EINVAL ; + else + { + size_t pathlen = strlen(path) + 1 ; + size_t filelen = strlen(file) ; + int savederrno = 0 ; + while (pathlen) + { + size_t split = byte_chr(path, pathlen - 1, ':') ; + if (split) + { + char tmp[split + 2 + filelen] ; + memcpy(tmp, path, split) ; + tmp[split] = '/' ; + memcpy(tmp + split + 1, file, filelen + 1) ; + execve(tmp, (char *const *)argv, (char *const *)envp) ; + if (errno != ENOENT) + { + savederrno = errno ; + if ((errno != EACCES) && (errno != EPERM) && (errno != EISDIR)) break ; + } + } + path += split+1 ; pathlen -= split+1 ; + } + if (savederrno) errno = savederrno ; + } +} diff --git a/src/libposixplz/execvep_loose.c b/src/libposixplz/execvep_loose.c new file mode 100644 index 0000000..7506362 --- /dev/null +++ b/src/libposixplz/execvep_loose.c @@ -0,0 +1,13 @@ +/* ISC license. */ + +#include <unistd.h> +#include <skalibs/posixplz.h> +#include "posixplz-internal.h" + +void execvep_loose (char const *file, char const *const *argv, char const *const *envp, char const *path) +{ + if (file[0] == '/') + execve(file, (char *const *)argv, (char *const *)envp) ; + else + execvep_internal(file, argv, envp, path) ; +} diff --git a/src/libposixplz/posixplz-internal.h b/src/libposixplz/posixplz-internal.h new file mode 100644 index 0000000..c3da73a --- /dev/null +++ b/src/libposixplz/posixplz-internal.h @@ -0,0 +1,8 @@ +/* ISC license. */ + +#ifndef POSIXPLZ_INTERNAL_H +#define POSIXPLZ_INTERNAL_H + +extern void execvep_internal (char const *, char const *const *, char const *const *, char const *) ; + +#endif |