mirror of
https://github.com/reactos/ccache.git
synced 2025-01-10 13:30:13 +00:00
130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/*
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Copyright (C) Andrew Tridgell 2002
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "ccache.h"
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/*
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execute a compiler backend, capturing all output to the given paths
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the full path to the compiler to run is in argv[0]
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*/
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int execute(char **argv,
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const char *path_stdout,
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const char *path_stderr)
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{
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pid_t pid;
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int status;
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pid = fork();
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if (pid == -1) fatal("Failed to fork");
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if (pid == 0) {
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int fd;
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unlink(path_stdout);
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fd = open(path_stdout, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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if (fd == -1) {
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exit(STATUS_NOCACHE);
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}
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dup2(fd, 1);
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close(fd);
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unlink(path_stderr);
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fd = open(path_stderr, O_WRONLY|O_CREAT|O_TRUNC|O_EXCL|O_BINARY, 0666);
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if (fd == -1) {
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exit(STATUS_NOCACHE);
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}
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dup2(fd, 2);
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close(fd);
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exit(execv(argv[0], argv));
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}
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if (waitpid(pid, &status, 0) != pid) {
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fatal("waitpid failed");
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}
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if (WEXITSTATUS(status) == 0 && WIFSIGNALED(status)) {
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return -1;
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}
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return WEXITSTATUS(status);
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}
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/*
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find an executable by name in $PATH. Exclude any that are links to exclude_name
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*/
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char *find_executable(const char *name, const char *exclude_name)
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{
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char *path;
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char *tok;
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struct stat st1, st2;
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if (*name == '/') {
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return x_strdup(name);
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}
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path = getenv("CCACHE_PATH");
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if (!path) {
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path = getenv("PATH");
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}
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if (!path) {
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cc_log("no PATH variable!?\n");
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return NULL;
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}
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path = x_strdup(path);
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/* search the path looking for the first compiler of the right name
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that isn't us */
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for (tok=strtok(path,":"); tok; tok = strtok(NULL, ":")) {
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char *fname;
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x_asprintf(&fname, "%s/%s", tok, name);
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/* look for a normal executable file */
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if (access(fname, X_OK) == 0 &&
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lstat(fname, &st1) == 0 &&
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stat(fname, &st2) == 0 &&
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S_ISREG(st2.st_mode)) {
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/* if its a symlink then ensure it doesn't
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point at something called exclude_name */
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if (S_ISLNK(st1.st_mode)) {
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char *buf = x_realpath(fname);
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if (buf) {
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char *p = str_basename(buf);
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if (strcmp(p, exclude_name) == 0) {
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/* its a link to "ccache" ! */
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free(p);
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free(buf);
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continue;
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}
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free(buf);
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free(p);
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}
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}
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/* found it! */
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free(path);
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return fname;
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}
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free(fname);
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}
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return NULL;
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}
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