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-rw-r--r--src/process/execvp.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/src/process/execvp.c b/src/process/execvp.c
new file mode 100644
index 00000000..d799ddae
--- /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;
+}