a3b9f7fe8a
Needed for modern versions of systemd and udev. Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
164 lines
4.9 KiB
Diff
164 lines
4.9 KiB
Diff
From 0eb30761a26c46aaf555464114851202ae9c27bd Mon Sep 17 00:00:00 2001
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From: Henning Heinold <heinold@inf.fu-berlin.de>
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Date: Sat, 4 Jun 2011 21:23:15 +0200
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Subject: [PATCH] libc: add non standard execvpe function
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[Gustavo]: Drop TODO modification to make it compatible
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Signed-off-by: Henning Heinold <heinold@inf.fu-berlin.de>
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Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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---
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include/unistd.h | 8 ++++++++
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libc/unistd/exec.c | 38 +++++++++++++++++++++++++++++++++-----
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libc/unistd/execvpe.c | 7 +++++++
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4 files changed, 52 insertions(+), 5 deletions(-)
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create mode 100644 libc/unistd/execvpe.c
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diff --git a/include/unistd.h b/include/unistd.h
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index feadf93..9479554 100644
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--- a/include/unistd.h
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+++ b/include/unistd.h
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@@ -619,6 +619,14 @@ extern int execlp (const char *__file, const char *__arg, ...)
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__THROW __nonnull ((1));
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libc_hidden_proto(execlp)
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+#ifdef __USE_GNU
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+/* Execute FILE, searching in the `PATH' environment variable if it contains
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+ no slashes, with arguments ARGV and environment from a pointer */
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+extern int execvpe (__const char *__file, char *__const __argv[], char *__const __envp[])
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+ __THROW __nonnull ((1));
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+libc_hidden_proto(execvpe)
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+#endif
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+
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#if defined __USE_MISC || defined __USE_XOPEN
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/* Add INC to priority of the current process. */
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diff --git a/libc/unistd/exec.c b/libc/unistd/exec.c
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index ba92989..8fa42e5 100644
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--- a/libc/unistd/exec.c
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+++ b/libc/unistd/exec.c
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@@ -32,6 +32,8 @@
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/**********************************************************************/
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#define EXEC_FUNC_COMMON 0
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#define EXEC_FUNC_EXECVP 1
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+#define EXEC_FUNC_EXECVPE 2
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+
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#if defined(__ARCH_USE_MMU__)
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/* We have an MMU, so use alloca() to grab space for buffers and arg lists. */
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@@ -58,6 +60,7 @@
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* execle(a) -> execve(-)
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* execv(-) -> execve(-)
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* execvp(a) -> execve(-)
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+ * execvpe(a) -> execve(-)
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*/
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# define EXEC_ALLOC_SIZE(VAR) /* nothing to do */
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@@ -219,15 +222,18 @@ libc_hidden_def(execlp)
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#endif
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/**********************************************************************/
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-#ifdef L_execvp
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+#if defined (L_execvp) || defined(L_execvpe)
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/* Use a default path that matches glibc behavior, since SUSv3 says
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* this is implementation-defined. The default is current working dir,
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* /bin, and then /usr/bin. */
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static const char default_path[] = ":/bin:/usr/bin";
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-
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+#if defined (L_execvp)
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int execvp(const char *path, char *const argv[])
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+#elif defined (L_execvpe)
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+int execvpe(const char *path, char *const argv[], char *const envp[])
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+#endif
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{
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char *buf = NULL;
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char *p;
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@@ -245,7 +251,11 @@ int execvp(const char *path, char *const argv[])
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}
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if (strchr(path, '/')) {
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+#if defined (L_execvp)
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execve(path, argv, __environ);
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+#elif defined (L_execvpe)
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+ execve(path, argv, envp);
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+#endif
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if (errno == ENOEXEC) {
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char **nargv;
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EXEC_ALLOC_SIZE(size2) /* Do NOT add a semicolon! */
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@@ -254,11 +264,19 @@ int execvp(const char *path, char *const argv[])
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/* Need the dimension - 1. We omit counting the trailing
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* NULL but we actually omit the first entry. */
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for (n=0 ; argv[n] ; n++) {}
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+#if defined (L_execvp)
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nargv = (char **) EXEC_ALLOC((n+2) * sizeof(char *), size2, EXEC_FUNC_EXECVP);
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+#elif defined (L_execvpe)
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+ nargv = (char **) EXEC_ALLOC((n+2) * sizeof(char *), size2, EXEC_FUNC_EXECVPE);
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+#endif
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nargv[0] = argv[0];
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nargv[1] = (char *)path;
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memcpy(nargv+2, argv+1, n*sizeof(char *));
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+#if defined (L_execvp)
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execve("/bin/sh", nargv, __environ);
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+#elif defined (L_execvpe)
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+ execve("/bin/sh", nargv, envp);
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+#endif
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EXEC_FREE(nargv, size2);
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}
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} else {
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@@ -277,8 +295,11 @@ int execvp(const char *path, char *const argv[])
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return -1;
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}
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len = (FILENAME_MAX - 1) - plen;
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-
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+#if defined (L_execvp)
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buf = EXEC_ALLOC(FILENAME_MAX, size, EXEC_FUNC_EXECVP);
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+#elif defined (L_execvpe)
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+ buf = EXEC_ALLOC(FILENAME_MAX, size, EXEC_FUNC_EXECVPE);
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+#endif
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{
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int seen_small = 0;
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s0 = buf + len;
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@@ -300,8 +321,11 @@ int execvp(const char *path, char *const argv[])
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s[plen-1] = '/';
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}
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+#if defined (L_execvp)
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execve(s, argv, __environ);
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-
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+#elif defined (L_execvpe)
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+ execve(s, argv, envp);
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+#endif
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seen_small = 1;
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if (errno == ENOEXEC) {
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@@ -325,7 +349,11 @@ int execvp(const char *path, char *const argv[])
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return -1;
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}
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+#if defined (L_execvp)
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libc_hidden_def(execvp)
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-
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+#elif defined (L_execvpe)
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+libc_hidden_def(execvpe)
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#endif
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+
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+#endif /* #if defined (L_execvp) || defined(L_execvpe) */
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/**********************************************************************/
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diff --git a/libc/unistd/execvpe.c b/libc/unistd/execvpe.c
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new file mode 100644
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index 0000000..c3c1e43
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--- /dev/null
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+++ b/libc/unistd/execvpe.c
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@@ -0,0 +1,7 @@
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+/* Copyright (C) 2011-2013 Hennning Heinold <heinold@inf.fu-berlin.de>
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+ *
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+ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
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+ */
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+
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+#define L_execvpe
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+#include "exec.c"
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--
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1.8.1.5
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