From 3534b428629be185e096be99e3bd5fdfe32d5544 Mon Sep 17 00:00:00 2001 From: Laurent Bercot Date: Thu, 18 Sep 2014 18:55:44 +0000 Subject: initial commit with rc for skalibs-2.0.0.0 --- src/libstddjb/execvep.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 src/libstddjb/execvep.c (limited to 'src/libstddjb/execvep.c') diff --git a/src/libstddjb/execvep.c b/src/libstddjb/execvep.c new file mode 100644 index 0000000..1639236 --- /dev/null +++ b/src/libstddjb/execvep.c @@ -0,0 +1,38 @@ +/* ISC license. */ + +#include +#include +#include +#include + +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 */ + else + { + unsigned int pathlen = str_len(path) + 1 ; + unsigned int filelen = str_len(file) ; + int savederrno = 0 ; + while (pathlen) + { + unsigned int split = byte_chr(path, pathlen - 1, ':') ; + if (split) + { + char tmp[split + 2 + filelen] ; + byte_copy(tmp, split, path) ; + tmp[split] = '/' ; + byte_copy(tmp + split + 1, filelen + 1, file) ; + 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 ; + } +} -- cgit v1.3.1