53 lines
1.4 KiB
Diff
53 lines
1.4 KiB
Diff
commit d6516ba4c88f217fe14455db92c60cd0e9af18f8
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Author: Sven Schnelle <svens@linux.ibm.com>
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Date: Thu Dec 16 12:43:55 2021 +0100
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use slurp_proc_file() in get_command_line()
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This way the size of the command line that get_command_line() can handle
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is no longer fixed.
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Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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diff --git a/kexec/kexec.c b/kexec/kexec.c
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index f3adac517161d448552a16fd79488c1df100d356..7e4787bc821107b7af66ebdbcfc31f4e7e1d48cd 100644
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--- a/kexec/kexec.c
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+++ b/kexec/kexec.c
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@@ -1172,25 +1172,19 @@ static char *slurp_proc_file(const char *filename, size_t *len)
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*/
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char *get_command_line(void)
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{
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- FILE *fp;
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- char *line;
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- const int sizeof_line = 2048;
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-
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- line = malloc(sizeof_line);
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- if (line == NULL)
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- die("Could not allocate memory to read /proc/cmdline.");
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-
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- fp = fopen("/proc/cmdline", "r");
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- if (!fp)
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- die("Could not open /proc/cmdline.");
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-
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- if (fgets(line, sizeof_line, fp) == NULL)
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- die("Can't read /proc/cmdline.");
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+ char *p, *line;
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+ size_t size;
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- fclose(fp);
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+ line = slurp_proc_file("/proc/cmdline", &size);
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+ if (!line || !size)
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+ die("Failed to read /proc/cmdline\n");
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/* strip newline */
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- line[strlen(line) - 1] = '\0';
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+ line[size-1] = '\0';
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+
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+ p = strpbrk(line, "\r\n");
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+ if (p)
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+ *p = '\0';
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remove_parameter(line, "BOOT_IMAGE");
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if (kexec_flags & KEXEC_ON_CRASH)
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