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Diffstat (limited to 'src/libposixplz/execvep_internal.c')
-rw-r--r--src/libposixplz/execvep_internal.c37
1 files changed, 37 insertions, 0 deletions
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 ;
+ }
+}