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authorLars Hjemli <hjemli@gmail.com>2011-03-26 11:22:35 +0100
committerLars Hjemli <hjemli@gmail.com>2011-03-26 11:27:29 +0100
commitc2b58ed8539fcfa4f05cc9da316bbc782f4b8f10 (patch)
tree96fc98e1cff5caebbd73725d4ca0605211ebe83f /shared.c
parentb2cf630a4b423bbda6507b7f658042563e76b36e (diff)
downloadcgit-c2b58ed8539fcfa4f05cc9da316bbc782f4b8f10.tar.gz
cgit-c2b58ed8539fcfa4f05cc9da316bbc782f4b8f10.tar.bz2
shared.c: use execvp() to execute filter commands
This reintroduces the use of execvp(), since the filter commands doesn't always contain an absolute path (i.e. snapshot compression filters). Signed-off-by: Lars Hjemli <hjemli@gmail.com>
Diffstat (limited to 'shared.c')
-rw-r--r--shared.c68
1 files changed, 11 insertions, 57 deletions
diff --git a/shared.c b/shared.c
index 8c3d18a..986f965 100644
--- a/shared.c
+++ b/shared.c
@@ -383,7 +383,7 @@ typedef struct {
char * value;
} cgit_env_var;
-static char * prepare_env(struct cgit_repo * repo) {
+static void prepare_env(struct cgit_repo * repo) {
cgit_env_var env_vars[] = {
{ .name = "CGIT_REPO_URL", .value = repo->url },
{ .name = "CGIT_REPO_NAME", .value = repo->name },
@@ -394,52 +394,14 @@ static char * prepare_env(struct cgit_repo * repo) {
{ .name = "CGIT_REPO_CLONE_URL", .value = repo->clone_url }
};
int env_var_count = ARRAY_SIZE(env_vars);
- long values_space = (env_var_count * (PATH_MAX + 64));
-
- void * buffer;
- char ** vars;
- char * values;
- int vars_index = 0;
- unsigned int chars_printed;
-
- /* Allocate buffer for environment variables: first in the buffer is an
- * array of pointers to argument strings, terminated with a NULL pointer.
- * After that the argument strings are placed after each other */
- buffer = malloc(((env_var_count + 1) * sizeof(char *)) + values_space);
- if (!buffer)
- return NULL;
-
- vars = buffer;
- values = (char *) &vars[env_var_count + 1];
-
- /* loop over all defined environment variables and their values */
- while (vars_index < env_var_count) {
- char * name = env_vars[vars_index].name;
- char * value = env_vars[vars_index].value;
-
- if (!value)
- value = "";
-
- chars_printed = snprintf(values, (values_space - 1), "%s=%s", name,
- value);
- if (chars_printed > (values_space - 1)) {
- /* Buffer space exhausted: stop adding variables.
- * Not all environment variables are defined, but the best we can
- * do is to provide the ones that _are_ defined */
- break;
- }
-
- values[chars_printed] = '\0';
- *&vars[vars_index] = values;
- values += (chars_printed + 1);
- values_space -= (chars_printed + 1);
- vars_index++;
- }
-
- /* terminate the array with pointers */
- *&vars[vars_index] = NULL;
-
- return (char *) buffer;
+ cgit_env_var *p, *q;
+ static char *warn = "cgit warning: failed to set env: %s=%s\n";
+
+ p = env_vars;
+ q = p + env_var_count;
+ for (; p < q; p++)
+ if (setenv(p->name, p->value, 1))
+ fprintf(stderr, warn, p->name, p->value);
}
int cgit_open_filter(struct cgit_filter *filter, struct cgit_repo * repo)
@@ -450,20 +412,12 @@ int cgit_open_filter(struct cgit_filter *filter, struct cgit_repo * repo)
chk_zero(pipe(filter->pipe_fh), "Unable to create pipe to subprocess");
filter->pid = chk_non_negative(fork(), "Unable to create subprocess");
if (filter->pid == 0) {
- char * env = NULL;
-
close(filter->pipe_fh[1]);
chk_non_negative(dup2(filter->pipe_fh[0], STDIN_FILENO),
"Unable to use pipe as STDIN");
-
if (repo)
- env = prepare_env(repo);
-
- execve(filter->cmd, filter->argv, (char **)env);
-
- if (env)
- free(env);
-
+ prepare_env(repo);
+ execvp(filter->cmd, filter->argv);
die("Unable to exec subprocess %s: %s (%d)", filter->cmd,
strerror(errno), errno);
}