diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/sysctl.c | 148 | ||||
| -rw-r--r-- | src/util.c | 3 |
2 files changed, 151 insertions, 0 deletions
diff --git a/src/sysctl.c b/src/sysctl.c new file mode 100644 index 0000000000..c57210e28d --- /dev/null +++ b/src/sysctl.c @@ -0,0 +1,148 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +/*** + This file is part of systemd. + + Copyright 2010 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <stdlib.h> +#include <stdbool.h> +#include <errno.h> +#include <string.h> +#include <ftw.h> +#include <stdio.h> +#include <limits.h> + +#include "log.h" +#include "util.h" + +#define PROC_SYS_PREFIX "/proc/sys/" + +static int exit_code = 0; + +static void apply_sysctl(const char *property, const char *value) { + char *p, *n; + int r; + + log_debug("Setting '%s' to '%s'", property, value); + + if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) { + log_error("Out of memory"); + exit_code = -ENOMEM; + } + + n = stpcpy(p, PROC_SYS_PREFIX); + strcpy(n, property); + + for (; *n; n++) + if (*n == '.') + *n = '/'; + + if ((r = write_one_line_file(p, value)) < 0) { + log_warning("Failed to write '%s' to '%s': %s", value, p, strerror(-r)); + exit_code = r; + } + + free(p); +} + +static void apply_file(const char *path) { + FILE *f; + + assert(path); + + if (!(f = fopen(path, "re"))) { + log_error("Failed to open file '%s', ignoring: %m", path); + exit_code = -errno; + return; + } + + while (!feof(f)) { + char l[LINE_MAX], *p, *value; + + if (!fgets(l, sizeof(l), f)) { + if (feof(f)) + break; + + log_error("Failed to read file '%s', ignoring: %m", path); + exit_code = -errno; + goto finish; + } + + p = strstrip(l); + + if (!*p) + continue; + + if (strchr(COMMENTS, *p)) + continue; + + if (!(value = strchr(p, '='))) { + log_error("Line is not an assignment in file '%s': %s", path, value); + exit_code = -EINVAL; + continue; + } + + *value = 0; + value++; + + apply_sysctl(strstrip(p), strstrip(value)); + } + +finish: + fclose(f); +} + +static int nftw_cb( + const char *fpath, + const struct stat *sb, + int tflag, + struct FTW *ftwbuf) { + + if (tflag != FTW_F) + return 0; + + if (ignore_file(fpath + ftwbuf->base)) + return 0; + + if (!endswith(fpath, ".conf")) + return 0; + + apply_file(fpath); + return 0; +}; + +int main(int argc, char *argv[]) { + + if (argc > 2) { + log_error("This program expects one or no arguments."); + return EXIT_FAILURE; + } + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); + + if (argc > 1) + nftw(argv[1], nftw_cb, 64, FTW_MOUNT|FTW_PHYS); + else { + nftw("/etc/sysctl.conf", nftw_cb, 64, FTW_MOUNT|FTW_PHYS); + nftw("/etc/sysctl.d", nftw_cb, 64, FTW_MOUNT|FTW_PHYS); + } + + return exit_code < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} diff --git a/src/util.c b/src/util.c index 861f9eaa43..0cd78f6561 100644 --- a/src/util.c +++ b/src/util.c @@ -495,6 +495,9 @@ int write_one_line_file(const char *fn, const char *line) { goto finish; } + if (!endswith(line, "\n")) + fputc('\n', f); + r = 0; finish: fclose(f); |