From 24a988e9aa17a476cb5381e2334aaa2a9972ddd2 Mon Sep 17 00:00:00 2001 From: Harald Hoyer Date: Fri, 8 Mar 2013 10:50:33 +0100 Subject: cryptsetup-generator: use _cleanup_ where possible --- src/cryptsetup/cryptsetup-generator.c | 209 +++++++++++----------------------- 1 file changed, 65 insertions(+), 144 deletions(-) (limited to 'src/cryptsetup/cryptsetup-generator.c') diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c index 38a7cfa0b6..0a51db8939 100644 --- a/src/cryptsetup/cryptsetup-generator.c +++ b/src/cryptsetup/cryptsetup-generator.c @@ -34,7 +34,6 @@ static const char *arg_dest = "/tmp"; static bool arg_enabled = true; static bool arg_read_crypttab = true; -static char **arg_proc_cmdline_disks = NULL; static bool has_option(const char *haystack, const char *needle) { const char *f = haystack; @@ -71,9 +70,8 @@ static int create_disk( const char *password, const char *options) { - char *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL; - int r; - FILE *f = NULL; + char _cleanup_free_ *p = NULL, *n = NULL, *d = NULL, *u = NULL, *from = NULL, *to = NULL, *e = NULL; + FILE _cleanup_fclose_ *f = NULL; bool noauto, nofail; assert(name); @@ -83,34 +81,25 @@ static int create_disk( nofail = has_option(options, "nofail"); n = unit_name_from_path_instance("systemd-cryptsetup", name, ".service"); - if (!n) { - r = log_oom(); - goto fail; - } + if (!n) + return log_oom(); p = strjoin(arg_dest, "/", n, NULL); - if (!p) { - r = log_oom(); - goto fail; - } + if (!p) + return log_oom(); u = fstab_node_to_udev_node(device); - if (!u) { - r = log_oom(); - goto fail; - } + if (!u) + return log_oom(); d = unit_name_from_path(u, ".device"); - if (!d) { - r = log_oom(); - goto fail; - } + if (!d) + return log_oom(); f = fopen(p, "wxe"); if (!f) { - r = -errno; log_error("Failed to create unit file %s: %m", p); - goto fail; + return -errno; } fprintf(f, @@ -160,47 +149,39 @@ static int create_disk( fflush(f); if (ferror(f)) { - r = -errno; log_error("Failed to write file %s: %m", p); - goto fail; + return -errno; } - if (asprintf(&from, "../%s", n) < 0) { - r = log_oom(); - goto fail; - } + if (asprintf(&from, "../%s", n) < 0) + return log_oom(); if (!noauto) { to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); - if (!to) { - r = log_oom(); - goto fail; - } + if (!to) + return log_oom(); mkdir_parents_label(to, 0755); if (symlink(from, to) < 0) { log_error("Failed to create symlink '%s' to '%s': %m", from, to); - r = -errno; - goto fail; + return -errno; } free(to); + to = NULL; if (!nofail) to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL); else to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL); - if (!to) { - r = log_oom(); - goto fail; - } + if (!to) + return log_oom(); mkdir_parents_label(to, 0755); if (symlink(from, to) < 0) { log_error("Failed to create symlink '%s' to '%s': %m", from, to); - r = -errno; - goto fail; + return -errno; } free(to); @@ -209,37 +190,21 @@ static int create_disk( e = unit_name_escape(name); to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); - if (!to) { - r = log_oom(); - goto fail; - } + if (!to) + return log_oom(); mkdir_parents_label(to, 0755); if (symlink(from, to) < 0) { log_error("Failed to create symlink '%s' to '%s': %m", from, to); - r = -errno; - goto fail; + return -errno; } - r = 0; - -fail: - free(p); - free(n); - free(d); - free(e); - - free(from); - free(to); - - if (f) - fclose(f); - - return r; + return 0; } -static int parse_proc_cmdline(void) { - char *line, *w, *state; +static int parse_proc_cmdline(char ***arg_proc_cmdline_disks) { + char _cleanup_free_ *line = NULL; + char *w = NULL, *state = NULL; int r; size_t l; @@ -253,13 +218,11 @@ static int parse_proc_cmdline(void) { } FOREACH_WORD_QUOTED(w, l, line, state) { - char *word; + char _cleanup_free_ *word = NULL; word = strndup(w, l); - if (!word) { - r = log_oom(); - goto finish; - } + if (!word) + return log_oom(); if (startswith(word, "luks=")) { r = parse_boolean(word + 5); @@ -298,26 +261,24 @@ static int parse_proc_cmdline(void) { } else if (startswith(word, "luks.uuid=")) { char **t; - t = strv_append(arg_proc_cmdline_disks, word + 10); - if (!t) { - r = log_oom(); - goto finish; - } - strv_free(arg_proc_cmdline_disks); - arg_proc_cmdline_disks = t; + t = strv_append(*arg_proc_cmdline_disks, word + 10); + if (!t) + return log_oom(); + + strv_free(*arg_proc_cmdline_disks); + *arg_proc_cmdline_disks = t; } else if (startswith(word, "rd.luks.uuid=")) { if (in_initrd()) { char **t; - t = strv_append(arg_proc_cmdline_disks, word + 13); - if (!t) { - r = log_oom(); - goto finish; - } - strv_free(arg_proc_cmdline_disks); - arg_proc_cmdline_disks = t; + t = strv_append(*arg_proc_cmdline_disks, word + 13); + if (!t) + return log_oom(); + + strv_free(*arg_proc_cmdline_disks); + *arg_proc_cmdline_disks = t; } } else if (startswith(word, "luks.") || @@ -325,25 +286,20 @@ static int parse_proc_cmdline(void) { log_warning("Unknown kernel switch %s. Ignoring.", word); } - - free(word); } - strv_uniq(arg_proc_cmdline_disks); - - r = 0; + strv_uniq(*arg_proc_cmdline_disks); -finish: - free(line); - return r; + return 0; } int main(int argc, char *argv[]) { - FILE *f = NULL; - int r = EXIT_SUCCESS; + FILE _cleanup_fclose_ *f = NULL; unsigned n = 0; + int r = EXIT_SUCCESS; char **i; - char **arg_proc_cmdline_disks_done = NULL; + char _cleanup_strv_free_ **arg_proc_cmdline_disks_done = NULL; + char _cleanup_strv_free_ **arg_proc_cmdline_disks = NULL; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); @@ -359,13 +315,11 @@ int main(int argc, char *argv[]) { umask(0022); - if (parse_proc_cmdline() < 0) + if (parse_proc_cmdline(&arg_proc_cmdline_disks) < 0) return EXIT_FAILURE; - if (!arg_enabled) { - r = EXIT_SUCCESS; - goto finish; - } + if (!arg_enabled) + return EXIT_SUCCESS; if (arg_read_crypttab) { f = fopen("/etc/crypttab", "re"); @@ -377,13 +331,9 @@ int main(int argc, char *argv[]) { r = EXIT_FAILURE; log_error("Failed to open /etc/crypttab: %m"); } - - goto finish; - } - - for (;;) { + } else for (;;) { char line[LINE_MAX], *l; - char *name = NULL, *device = NULL, *password = NULL, *options = NULL; + char _cleanup_free_ *name = NULL, *device = NULL, *password = NULL, *options = NULL; int k; if (!fgets(line, sizeof(line), f)) @@ -399,7 +349,7 @@ int main(int argc, char *argv[]) { if (k < 2 || k > 4) { log_error("Failed to parse /etc/crypttab:%u, ignoring.", n); r = EXIT_FAILURE; - goto next; + continue; } if (arg_proc_cmdline_disks) { @@ -408,7 +358,7 @@ int main(int argc, char *argv[]) { for /etc/crypttab and only generate units for those. */ STRV_FOREACH(i, arg_proc_cmdline_disks) { - char *proc_device, *proc_name; + char _cleanup_free_ *proc_device = NULL, *proc_name = NULL; const char *p = *i; if (startswith(p, "luks-")) @@ -417,13 +367,9 @@ int main(int argc, char *argv[]) { proc_name = strappend("luks-", p); proc_device = strappend("UUID=", p); - if (!proc_name || !proc_device) { - log_oom(); - r = EXIT_FAILURE; - free(proc_name); - free(proc_device); - goto finish; - } + if (!proc_name || !proc_device) + return log_oom(); + if (streq(proc_device, device) || streq(proc_name, name)) { char **t; @@ -431,27 +377,17 @@ int main(int argc, char *argv[]) { r = EXIT_FAILURE; t = strv_append(arg_proc_cmdline_disks_done, p); - if (!t) { - r = log_oom(); - goto finish; - } + if (!t) + return log_oom(); + strv_free(arg_proc_cmdline_disks_done); arg_proc_cmdline_disks_done = t; } - - free(proc_device); - free(proc_name); } } else { if (create_disk(name, device, password, options) < 0) r = EXIT_FAILURE; } - - next: - free(name); - free(device); - free(password); - free(options); } } @@ -461,7 +397,7 @@ int main(int argc, char *argv[]) { on the kernel command line and not yet written. */ - char *name, *device; + char _cleanup_free_ *name = NULL, *device = NULL; const char *p = *i; if (startswith(p, "luks-")) @@ -473,27 +409,12 @@ int main(int argc, char *argv[]) { name = strappend("luks-", p); device = strappend("UUID=", p); - if (!name || !device) { - log_oom(); - r = EXIT_FAILURE; - free(name); - free(device); - goto finish; - } + if (!name || !device) + return log_oom(); if (create_disk(name, device, NULL, "timeout=0") < 0) r = EXIT_FAILURE; - - free(name); - free(device); } -finish: - if (f) - fclose(f); - - strv_free(arg_proc_cmdline_disks); - strv_free(arg_proc_cmdline_disks_done); - return r; } -- cgit v1.2.3