#include #include #include #include #include #include #include #include #include "subcmd-util.h" #include "exec-cmd.h" #include "subcmd-config.h" #define MAX_ARGS 32 #define PATH_MAX 4096 static const char *argv_exec_path; static const char *argv0_path; void exec_cmd_init(const char *exec_name, const char *prefix, const char *exec_path, const char *exec_path_env) { subcmd_config.exec_name = exec_name; subcmd_config.prefix = prefix; subcmd_config.exec_path = exec_path; subcmd_config.exec_path_env = exec_path_env; } #define is_dir_sep(c) ((c) == '/') static int is_absolute_path(const char *path) { return path[0] == '/'; } static const char *get_pwd_cwd(void) { static char cwd[PATH_MAX + 1]; char *pwd; struct stat cwd_stat, pwd_stat; if (getcwd(cwd, PATH_MAX) == NULL) return NULL; pwd = getenv("PWD"); if (pwd && strcmp(pwd, cwd)) { stat(cwd, &cwd_stat); if (!stat(pwd, &pwd_stat) && pwd_stat.st_dev == cwd_stat.st_dev && pwd_stat.st_ino == cwd_stat.st_ino) { strlcpy(cwd, pwd, PATH_MAX); } } return cwd; } static const char *make_nonrelative_path(const char *path) { static char buf[PATH_MAX + 1]; if (is_absolute_path(path)) { if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX) die("Too long path: %.*s", 60, path); } else { const char *cwd = get_pwd_cwd(); if (!cwd) die("Cannot determine the current working directory"); if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX) die("Too long path: %.*s", 60, path); } return buf; } char *system_path(const char *path) { char *buf = NULL; if (is_absolute_path(path)) return strdup(path); astrcatf(&buf, "%s/%s", subcmd_config.prefix, path); return buf; } const char *extract_argv0_path(const char *argv0) { const char *slash; if (!argv0 || !*argv0) return NULL; slash = argv0 + strlen(argv0); while (argv0 <= slash && !is_dir_sep(*slash)) slash--; if (slash >= argv0) { argv0_path = strndup(argv0, slash - argv0); return argv0_path ? slash + 1 : NULL; } return argv0; } void set_argv_exec_path(const char *exec_path) { argv_exec_path = exec_path; /* * Propagate this setting to external programs. */ setenv(subcmd_config.exec_path_env, exec_path, 1); } /* Returns the highest-priority location to look for subprograms. */ char *get_argv_exec_path(void) { char *env; if (argv_exec_path) return strdup(argv_exec_path); env = getenv(subcmd_config.exec_path_env); if (env && *env) return strdup(env); return system_path(subcmd_config.exec_path); } static void add_path(char **out, const char *path) { if (path && *path) { if (is_absolute_path(path)) astrcat(out, path); else astrcat(out, make_nonrelative_path(path)); astrcat(out, ":"); } } void setup_path(void) { const char *old_path = getenv("PATH"); char *new_path = NULL; char *tmp = get_argv_exec_path(); add_path(&new_path, tmp); add_path(&new_path, argv0_path); free(tmp); if (old_path) astrcat(&new_path, old_path); else astrcat(&new_path, "/usr/local/bin:/usr/bin:/bin"); setenv("PATH", new_path, 1); free(new_path); } static const char **prepare_exec_cmd(const char **argv) { int argc; const char **nargv; for (argc = 0; argv[argc]; argc++) ; /* just counting */ nargv = malloc(sizeof(*nargv) * (argc + 2)); nargv[0] = subcmd_config.exec_name; for (argc = 0; argv[argc]; argc++) nargv[argc + 1] = argv[argc]; nargv[argc + 1] = NULL; return nargv; } int execv_cmd(const char **argv) { const char **nargv = prepare_exec_cmd(argv); /* execvp() can only ever return if it fails */ execvp(subcmd_config.exec_name, (char **)nargv); free(nargv); return -1; } int execl_cmd(const char *cmd,...) { int argc; const char *argv[MAX_ARGS + 1]; const char *arg; va_list param; va_start(param, cmd); argv[0] = cmd; argc = 1; while (argc < MAX_ARGS) { arg = argv[argc++] = va_arg(param, char *); if (!arg) break; } va_end(param); if (MAX_ARGS <= argc) { fprintf(stderr, " Error: too many args to run %s\n", cmd); return -1; } argv[argc] = NULL; return execv_cmd(argv); } ight'>2016-12-12 21:58:13 -0800 commite7aa8c2eb11ba69b1b69099c3c7bd6be3087b0ba (patch) treef63906f41699c8e38af9d12b063e2ceab0286ef2 /arch/m32r/kernel/head.S parente34bac726d27056081d0250c0e173e4b155aa340 (diff)parent868c97a846a73e937d835b09b8c885a69df50ec8 (diff)
Merge tag 'docs-4.10' of git://git.lwn.net/linuxHEADmaster
Pull documentation update from Jonathan Corbet: "These are the documentation changes for 4.10. It's another busy cycle for the docs tree, as the sphinx conversion continues. Highlights include: - Further work on PDF output, which remains a bit of a pain but should be more solid now. - Five more DocBook template files converted to Sphinx. Only 27 to go... Lots of plain-text files have also been converted and integrated. - Images in binary formats have been replaced with more source-friendly versions. - Various bits of organizational work, including the renaming of various files discussed at the kernel summit. - New documentation for the device_link mechanism. ... and, of course, lots of typo fixes and small updates" * tag 'docs-4.10' of git://git.lwn.net/linux: (193 commits) dma-buf: Extract dma-buf.rst Update Documentation/00-INDEX docs: 00-INDEX: document directories/files with no docs docs: 00-INDEX: remove non-existing entries docs: 00-INDEX: add missing entries for documentation files/dirs docs: 00-INDEX: consolidate process/ and admin-guide/ description scripts: add a script to check if Documentation/00-INDEX is sane Docs: change sh -> awk in REPORTING-BUGS Documentation/core-api/device_link: Add initial documentation core-api: remove an unexpected unident ppc/idle: Add documentation for powersave=off Doc: Correct typo, "Introdution" => "Introduction" Documentation/atomic_ops.txt: convert to ReST markup Documentation/local_ops.txt: convert to ReST markup Documentation/assoc_array.txt: convert to ReST markup docs-rst: parse-headers.pl: cleanup the documentation docs-rst: fix media cleandocs target docs-rst: media/Makefile: reorganize the rules docs-rst: media: build SVG from graphviz files docs-rst: replace bayer.png by a SVG image ...
Diffstat (limited to 'arch/m32r/kernel/head.S')